By Sjw
gloucestershire,
United Kingdom 
A lot of my bearded irises have nearly finished flowering but the leaves have lots of yellowing and mottling on them. What is causing this and should I chop down all the leaves.
6 Jun, 2016
Picture of the problem might help with diagnosis.
Straight after flowering is the correct time to lift, divide and replant Bearded Iris. If you do that then you reduce the leaf length by about half.
6 Jun, 2016